Iridium Oxide Coating
Iridium Oxide Coating - Related Videos
05:41
Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
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Cited by 4 •
2016
A protocol for the photochemical oxidative growth of small crystalline iridium oxide nanoparticles on the surface of CdSe@CdS seeded rod nanoparticles is presented.
09:15
Iridium Oxide-reduced Graphene Oxide Nanohybrid Thin Film Modified Screen-printed Electrodes as Disposable Electrochemical Paper Microfluidic pH Sensors
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Cited by 5 •
2016
The study demonstrates the growth of iridium oxide-reduced graphene oxide (IrO2-RGO) nanohybrid thin films on irregular and rough screen-printed carbon substrate through a green electrochemical synthesis, and their implementation as a pH sensor with a patterned paper-fluidic platform.
12:52
Iridium(III) Luminescent Probe for Detection of the Malarial Protein Biomarker Histidine Rich Protein-II
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Cited by 4 •
2015
Robust detection reagents are of increasing necessity for developing new malaria diagnostic tools. An iridium(III) probe was designed that emits long-lasting luminescent signal in the presence of a histidine-rich malarial protein biomarker. Detection of the protein either in solution or immobilized on a magnetic particle affords flexibility in application.
03:14
Oxidation Numbers
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2020
In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules. Oxidation Number (Oxidation State) In the case of an ionic compound, oxidation numbers are assigned based on the number of electrons transferred between reacting species. For example, in the formation of calcium...
09:36
Polyethyleneimine-coated Iron Oxide Nanoparticles as a Vehicle for the Delivery of Small Interfering RNA to Macrophages In Vitro and In Vivo
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Cited by 21 •
2019
We describe a method of using polyethyleneimine (PEI)-coated superparamagnetic iron oxide nanoparticles for transfecting macrophages with siRNA. These nanoparticles can efficiently deliver siRNA to macrophages in vitro and in vivo and silence target gene expression.
FAQs
An applied potential drives reversible changes in the oxidation state of surface iridium centers. These changes regulate charge transport and support proton-coupled electron transfer at the electrode-electrolyte interface. Because the redox response is reversible, the coating can participate repeatedly in electrochemical reactions rather than serving only as a passive conductive layer.
Proton-coupled electron transfer links movement of protons with movement of electrons during electrochemical operation. In an iridium oxide coating, this coupling helps accommodate oxidation-state changes at the surface while maintaining charge-transfer activity. The mechanism is important because electrode reactions depend on coordinated proton and electron movement at the boundary between the coating and electrolyte.
Their usefulness comes from the combination of catalytic activity, electrical conductivity, and resistance to corrosion. In acidic water electrolysis, an anode must support oxygen evolution while remaining stable in a chemically aggressive environment. Iridium oxide addresses both requirements, allowing the electrode surface to promote the reaction without rapidly losing its functional integrity.
Coating thickness is an important design consideration because iridium is limited in availability. Research therefore emphasizes using thinner iridium oxide layers while retaining conductivity, catalytic performance, and corrosion resistance. This approach seeks to reduce material demand without sacrificing the electrochemical functions that make the coating valuable in demanding electrode environments.
Evaluation centers on placing the coated surface in an electrochemical environment and applying controlled potentials while monitoring its behavior. Researchers examine charge transport, reversible surface oxidation-state changes, catalytic activity, and resistance to corrosion. For acidic water electrolysis, the key outcome is whether the coating continues supporting oxygen evolution while remaining stable during operation.
Their electrical and chemical stability supports several electrochemical applications, including sensors, biomedical electrodes, and energy-conversion devices. In each case, the coating provides a functional interface where electrical signals or reactions occur while the surface tolerates the surrounding chemical conditions. These uses extend the material's relevance beyond catalytic anodes for water electrolysis.